3GPP defined a new RAN architectural in Release 15, where the gNB (Site Name for 5G) is logically split into three entities denoted as: CU: Centralized Unit. DU: Distributed Unit. RRU: Remote Radio Unit. The RAN functions that correspond to each of the three entities are determined by the so-called split points. After a thorough … Continue reading What is Distributed Unit (DU) in Open RAN?